2种低射速下火炮膛内模块装药烤燃特性的对比与分析  

Comparison and Analysis of Cook-Off Characteristics of Modular Charge in Gun Chamber at Two Low Firing Rates

作　　者：钱环宇 余永刚[1] QIAN Huan-yu;YU yong-gang(School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学能源与动力工程学院,南京210094

出　　处：《装备环境工程》2022年第3期32-38,共7页Equipment Environmental Engineering

基　　金：国家自然科学基金(52076111)。

摘　　要：目的 研究火炮多发连续射击后膛内模块装药的受热过程。方法 采用烤燃的思想建立模块装药留膛二维瞬态烤燃模型。以443 K为临界温度,求解火炮在2种低射速工况(以每分钟2、3发)下连续射击至药室内壁温度达到约443 K时的壁面温度分布,并以此为初始温度条件,对模块装药在膛内的烤燃过程进行数值模拟,对比分析2种低射速下火炮膛内模块装药的烤燃特性。结果 火炮以每分钟2发射击42发后,火炮药室内壁温度达到444.3 K,装填入内的模块装药在膛内滞留176.4 s后,发生烤燃响应,烤燃响应温度为484.2 K。射速为每分钟3发时,火炮射击39发后,药室内壁温度达到444.3 K,此时模块装药在膛内滞留216.9 s后会发生烤燃响应,烤燃响应温度为483.0 K。2种低射速工况下,模块装药的初始烤燃响应位置均位于模块盒右上角的内壁处。数值计算所得烤燃响应温度结果与试验一致。结论 该模型能够较好地分析模块装药在膛内的烤燃问题。射速对模块装药滞留膛内的烤燃特性有一定影响。To study the heating process of modular charge in gun chamber after multiple continuous firings, a two-dimensional transient cook-off model of modular charge retained in gun chamber was established with cook-off method.Taking 443 K as the critical temperature, the wall temperature distributions when the gun continuously fires until the temperature of the inner chamber wall reaches about 443 K are solved at two low firing rates of 2 rounds/min and 3 rounds/min, which are then adopted as the initial temperature. Based on that, the cook-off processes of modular charge in the chamber are numerically simulated to compare and discuss the cook-off characteristics of modular charge in gun chamber at two low firing rates.The results show that the temperature of the inner wall of the gun chamber reaches 444.3 K after 42 rounds at the firing rate of 2 rounds/min. The modular charge produces cook-off response after being retained in the chamber for 176.4 s with the cook-off response temperature of 484.2 K. When at 3 rounds/min, the inner wall temperature of the chamber reaches 444.3 K after 39 rounds, in which the modular charge produces cook-off response at 216.9 s with the temperature of 483.0 K. Under the two low firing rate conditions, the initial cook-off response positions of the modular charge are located in the upper right corner of the modular cartridge. The numerical results of cook-off off temperature are well consistent with the experimental results. The model is proved to be able to analyze the cook-off problem of modular charge in the chamber, and the firing rate has a certain influence on the cook-off characteristics of modular charge retained in gun chamber.

关 键 词：模块装药 烤燃 连续射击 火炮药室 壁面温度 

分 类 号：TJ450[兵器科学与技术—火炮、自动武器与弹药工程]